diff --git a/src/include/access/tableam.h b/src/include/access/tableam.h
index dbb709b56ce..9ab7201f4de 100644
--- a/src/include/access/tableam.h
+++ b/src/include/access/tableam.h
@@ -2095,6 +2095,12 @@ extern void table_block_relation_estimate_size(Relation rel,
  */
 
 extern const TableAmRoutine *GetTableAmRoutine(Oid amhandler);
+
+/* ----------------------------------------------------------------------------
+ * Functions in heapam_handler.c
+ * ----------------------------------------------------------------------------
+ */
+
 extern const TableAmRoutine *GetHeapamTableAmRoutine(void);
 
 #endif							/* TABLEAM_H */